The Digestive System

The Digestive System - Hey chew on this Weve made it to the...

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The Digestive System Hey- chew on this! We’ve made it to the. .
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Gastrointestinal System Function-physical and chemical breakdown of food Includes alimentary canal and accessory organs Accessory organs: Salivary glands, tongue, teeth, liver, gallbladder, and pancreas
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Alimentary canal Mouth- physical and chemical breakdown. Mastication-the act of chewing Saliva contains enzyme amylase to break down carbohydrates
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Pharynx- contains opening to trachea as well. Epiglottis covers opening of trachea. Esophagus-muscular tube dorsal to trachea Relies on a rhythmic wave-like motion called peristalsis
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Esophagus- transverse view
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Sphincter-a circular muscle that constricts a passage or closes a natural orifice (opening) Cardiac sphincter Pyloric sphincter Food sits in stomach for 1-4 hours. Gastric juices contain hydrochloric acid- activates pepsin, kills bacteria.
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Small intestine: not so small! 20ft x 1’’ Duodenum- 1 st 10 inches. Bile and
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This note was uploaded on 11/11/2011 for the course PDBIO 220 taught by Professor Tomco during the Winter '09 term at BYU.

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The Digestive System - Hey chew on this Weve made it to the...

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